Pasting mechanism



Sept. 1, 1942. I G. TUR-RALL 1 -2-, 294,,522

PASTING MECHANISM Filed Oct. 30, 1940 s Sheets-Sheet 1 INVENTOR A TNEY Sept- 1, 1942- s. TURRALL PASTING MEQHANI SM File d Oct. 50, 1940 s Sheets-Sheet 2 INVENTOR fieorg'e 70/70 ATTRNE'Y Patented Sept. 1, 1942 PASTl-NG MECHANISM George Turrall, London, England, assignor to R.

Hoe & 00. Inc., New York, N. Y., a corporation of New York Application October 30, 1940, Serial No. 363,410 2 In Great Britain October 30, 1939 14 Claims.

This invention relates to pasting mechanism of the kind employed in pasting together difierent printed sections passing from a printing machine.

In the production of certain classes of prodnot, it is necessary to effect a collecting operation by what is known as cylinder collection by which a leading section of a web is taken around a collecting cylinder and associated with a fresh leading section formed on the web by severing from it the section taken on the collecting cylinder, the section thus collected with the next section on the Web passing oil to a folding mechanism for example. The web (which may consist of a plurality of superposed webs) could pass over a former folder to have a page fold formed in it as the web passes to the collecting cylinder the alternate sections along the length of the web forming difierent page sections of the printed product.

In producing such a class of product it is frequently required that the collected sections should be pasted together and in the case when the web is passed over a former folder, the sections Would be pasted with a backato-back joint along the folded edges of the collected product. To effect such a pasting operation, a rotatable disc rotating through a paste trough has been employed to deposit by its periphery a line of paste on the section passing around the collecting cylinder and as the collecting cylinder had on it a section only on every other revolution the disc had a periphery formed by two radii, one larger than the other, and a blade or knife was employed to leave on the larger radius part of the disc the required thickness of paste and to wipe clean the smaller radius part, this latter part being thus inoperative.

As this blade had to operate on the two different radii, the blade was, in the known arrangements, given a reciprocatory motion as the disc rotated so that the blade was presented first to the large radius part and then to the small radius part. In modern high speed printing machines, this blade had to reciprocate at a relatively high speed to keep in step with the rotations of the disc and hence was subjected with its mechanism to high operating stresses.

The main object of the present invention is to provide an arrangement in which a reciprocatory blade can be dispensed with.

vAccording to the present invention a pasting vdevice comprises a paste contain-er, a segmental pasting member supported for rotation so that tainer, and wiping mechanism to wipe the side faces of the disc and to leave a regulated thickness of paste on the periphery of the member as it emerges from the paste, the said wiping mechanism including wipers which are resiliently biased so as to be sprung apart by and to wipe the faces of the member.

The invention is illustrated in the accompanying drawings in which Figure 1 is an end elevation partly in section, Figure 2 a side elevation partly in section and Figure 3 is a plan view.

Referring to the drawings, 1 indicates a paste trough on one side wall 2 of which is mounted a bracket 3 carrying a shaft 4 having at one end a hub 4' projecting into the trough I the hub carrying a segment pasting plate 5. The shaft 4 .is driven in any convenient manner so that the outer portion of the plate 5 sweeps as it rotates, through paste contained in the trough I; the shaft 4 is so driven in unison with the printing machine the products of which are to be pasted together, that the segmental periphery of the plate 5 would, as it passes out of the trough, apply a line of paste to the web section passing around the collecting cylinder of the machine in a manner which will be understood by those skilled in the art.

As the plate 5 rotates through the paste, not only is paste picked up by the .periphery, this paste being that required for use, but also the edge portions of the plate pick up paste and the following mechanism is provided to remove this latter paste which is not required for the pasting operation.

Extending up to and in rubbing contact at one of their ends with the boss 4' are two springy metal'wiping blades 6, 1, one on each side of the plate 5 and'arranged side by side the other ends and thesides of the blades '5, l remote from the hub 4' being clamped between U shaped frames 8 secured together by screws 8 and secured by bolts 8 on an end-wall 9 of the trough l These wiping blades 6, 1' are arranged adjacent the zone-at which-the plate 5 having rotated through the paste in the trough is emerging from the paste, the direction of rotation of the plate being indicated by the arrow R in Figure 2. The adjacent side edges oi the two bladesB, 1 are disposed close to or even touch one another and the arrangement is such that when the hub l and with it the plate 5 are rotated, then as the leading side edge E of the plate comes against the adjacent edges E, E of the wiping blades 6,21, these edges are flexed or sprung apart .to

the member sweeps through paste in the conallow the plate to rotate between them and when the segmental plate has rotated completely past the wiping plates the adjacent edges E, E of the blades spring towards one another again in readiness for the next rotation of the segmental plate. Thus, paste which is picked up by the segmental side faces of the segmental plate in rotating through the trough is removed by the wiping action of the adjacent side edges E, E of the wiping blades 6, 1 these edges having been sprung apart by the entry of the segmental plate between them. As the blades 6, I bear or are near at their inner ends against the periphery of the hub 4', this too is wiped cleanof any,

paste which may be upon it.

In order now to enable the thickness of paste on the periphery of the segmental plate to be controlled, the lower plate 8 is formed to slidably receive a block it having a forwardly extending tip I I disposed adjacent the periphery; this block has a fork i2 engaging between shoulders l3 on a bolt l4 so that by rotating the bolt [4 the block II] and hence the tip i l are adjusted towards and away from the periphery of the segmental blade 5. Obviously the clearance between the periphery of the segmental plate and the tip II will regulate the thickness of the paste.

It will be seen that except for the paste of regulated thickness on the periphery of the segmental plate 5, the Whole of the rotating part of the pasting member 5 is kept clear of paste.

While it is preferred to make the wiping blades of springy metal such as brass, the blades could be rigid in themselves and be biased as by springs.

To enable the leading edge of the segmental k plate easily to spring the edges of the wiping blades, this leading edge could be formed as a knife edge 15 to make a gradual penetration.

In addition, the wiping blades 6, 1 could be mounted for lateral adjustment (1. e. towards and away from the side faces of the segmental plate 5) to enable wear to be taken up.

Preferably the shaft 4 is driven at a speed such that the periphery of the segmental plate has a speed lower than that of the web to be pasted, this resulting in producing a wiping pasting action.

What I claim is:

l. A pasting device comprising in combination a paste container, a segmental pasting member, means supporting the said member for rotation so that it sweeps through paste in the container, and a wiping mechanism to wipe the side faces of the pasting member and to leave a regulated thickness of paste on its periphery as the member emerges from the paste, the said wiping mechanism including wipers which are resiliently biased and are disposed to be sprung apart by and to wipe the side faces of the pasting member.

2. A pasting device comprising in combination a paste container, a segmental pasting member, means supporting the said member for rotation so that it sweeps through paste in the container, and a wiping mechanism to wipe the side faces of the pasting member and to leave a regulated thickness of paste on its periphery as the member emerges from the paste, the said wiping mechanism including wipers which are formed of resilient metal and means being provided to secure the wipers so that adjacent edges are disposed about the path swept by the side faces of the pasting member and the said edges normally leave a gap smaller than the thickness of the pasting member so that as the pasting member rotates the wipers are sprung apart and react to wipe the side faces of the member.

3. A pasting device comprising in combination a paste container, a segmental pasting member, having its leading edge tapered, means supporting the said member for rotation so that it sweeps through paste in the container, and a wiping mechanism to wipe the side faces of the pasting member and to leave a regulated thickness of paste on its periphery as the member emerges from the paste, the said wiping mechanism including wipers which are resiliently biased and are disposed to be sprung apart by the tapered leading edge and to wipe the side faces of the pasting member,

4. A pasting device comprising in combination a paste container, a segmental pasting member, having its leading edge tapered, means supporting thesaid member for rotation so that it sweeps through paste in the container, and a wiping mechanism to Wipe the side faces of the pasting member and to leave a regulated thickness of paste on its periphery as the member emerges from the paste, the said wiping mechanism including wipers which are formed of resilient metal and means being provided to secure the wipers so that adjacent edges are disposed about the path swept by the side faces of the pasting member and the said edges normally leave a gap smaller than the thickness of the pasting member so that as the pasting member rotates the wipers are sprung apart by the tapered leading edge and'react to wipe the side faces of the member.

5. A pasting device comprising in combination a paste container, a segmental pasting member, means supporting the said member for rotation so that it sweeps through paste in the container, opposed wipers which are resiliently biased and are disposed to be sprung apart by and to wipe the side faces of the pasting member, a wiping block and means holding the said wiping block at a predetermined distance from the periphery of the pasting members so as to leave a predetermined thickness of paste on said periphery.

6. A pasting device comprising in combination a paste container, a segmental pasting member, means supporting the said member for rotation so that it sweeps through paste in the container, opposed wipers which are formed of resilient metal, and means to secure the wipers so that adjacent edges are disposed about the path swept by the side faces of the pasting member and the said edges normally leave a gap smaller than the thickness of the pasting member so that as the pasting member rotates the wipers are sprung apart and react to wipe the side faces of the member, a wiping block, and means holding the said wiping block at a predetermined distance from the periphery of the pasting member so as to leave a predetermined thickness of paste on said periphery.

7. A pasting device comprising in combination a paste container, a segmental pasting member, means supporting the said member for rotation so that it sweeps through paste in the container, opposed wipers which are resiliently biased and are disposed to be sprung apart by and to wipe the side faces of the pasting member, a wiping block and adjustable means holding the said wip ing block at an adjustable predetermined distance from the periphery of the pasting member so. as to leave a predetermined thickness of paste on said periphery.

, 8. A pasting device comprising in'combination a paste container, a segmental pasting member, means supporting the said member for rotation so that it sweeps through paste in the container, opposed wipers which are formed of resilient metal, and means to secure the wipers so that adjacent edges are disposed about the path swept by the side faces of the pasting member and the said edges normally leave a gap smaller than the thickness of the pasting member so that as the pasting member rotates the wipers are sprung apart and react to wipe the side faces of the member, a wiping block, and adjustable means holding said wiping block at an adjustable predetermined distance from the periphery of the pasting member so as to leave a predetermined thickness of paste on said periphery.

9. A pasting device comprising a paste container, a pasting plate having a part circular pasting periphery, means supporting said plate for rotation so that said plate passes through paste in the container, wiping means extending across the periphery and along the side faces of the plate, and means securing the said wiping means in such fixed relation to the container that as the plate rotates and emerges from the container the wiping means wipes the side faces of the plate and leaves a predetermined thickness of paste on the said part circular periphery.

10. A pasting device comprising a paste container, a pasting plate having a part circular pasting periphery, means supporting said plate for rotation so that said plate passes through paste in the container, wiping means extending across the periphery and along the side faces of the plate, and means securing the said wiping means in such fixed relation to the container that as the plate rotates and emerges from the container the wiping means Wipes the side faces of the plate and leaves a predetermined thickness of paste on the said part circular periphery, the said wiping means including a component co-operating with the part circular periphery and opposing components resiliently biased to be sprung apart by the plate and to engage th opposite side faces thereof.

11. A pasting device including in combination a paste container, a disc-shaped pasting member adapted to rotate through the paste in the container, means to remove the paste from the side faces of the disc, including opposed plates having edges resiliently pressed against the side faces of the disc.

12. A pasting device including in combination a paste container, a disc-shaped, pasting member adapted ,to rotate through the paste in the container, means to remove the paste from the side faces of and to regulate the amount of paste on the peripheral surface of the disc, including opposed plates having edges resiliently pressed against the side faces of the disc and a block extending toward the peripheral surface of the disc to dispose its forward edge closely adjacent thereto.

13. A pasting device including in combination a paste container, a disc-shaped pasting member adapted to rotate through the paste in the container, means to remove the paste from the side faces of and to regulate the amount of paste 0n the peripheral surface of the disc, including opposed plates having edges resiliently pressed against the side faces of the disc, said plates being adjustable toward the disc, and a block extending toward the peripheral surface of the disc to dispose its forward edge closely adjacent thereto, said block being adjustable toward the peripheral surface of the disc.

14. A pasting mechanism including in combination a paste container, a disc-shaped pasting member, a rotatable hub member to which said pasting member is secured, and opposed plates having forward edges resiliently pressed against the side faces of the disc and end edges disposed closely adjacent to the periphery of the hub.

member to remove paste therefrom.

GEORGE TURRALL. 

